sv2-header-check.sh

#! /usr/bin/sh
#
# This program ensures that the `sv2.h` file generated by `build_header.sh` for the submitted PR is
# in sync with the `sv2.h` file committed to `protocols/v2/sv2-ffi`. If they are out of sync, the
# GitHub Action will fail, preventing the PR from being merged.
#
# This script does the following:
#   (1) installs `cbindgen` which is a dependency of `build_header.sh`
#   (2) takes the SHA1 hash of the `sv2.h` file in `protocols/v2/sv2-ffi`
#   (3) executes `build_header.sh` to generate the `sv2.h` based on the contents of the PR
#   (4) takes the SHA1 hash of the `sv2.h` file generated by `build_header.sh`
#   (5) compares the hashes of each `sv2.h`, if they are equal then the GitHub Action passes, otherwise
#       the GitHub Action fails
#
# This script is called by `.github/workflows/sv2-header-check.yaml` on every PR onto the main branch.
#

cargo install  --version 0.20.0 cbindgen

set -ex
# cargo install cbindgen --force bts
# cbindgen -V

cd ./protocols/v2/sv2-ffi
SHA1_1=$(sha1sum sv2.h)
cd ../../..

BUILD_SCRIPT="./build_header.sh"
sh ./"$BUILD_SCRIPT"

SHA1_2=$(sha1sum sv2.h)

if [ "$SHA1_1" = "$SHA1_2" ];
then
  echo "Success. sv2.h files match."
  echo $SHA1_1
  exit 0
else
  echo "Fail. sv2.h files do not match."
  echo "./protocols/v2/sv2-ffi/sv2.h hash:"
  echo $SHA1_1
  echo "./sv2.h hash:"
  echo $SHA1_2
  exit -1
fi